Return-fitting for vapor-heating systems.



T. G. IVIOUAT.

RETURN FITTING FOR VAPOR HEATING SYSTEMS.

APPLICATION FILED' MAY I7. |911.

Patented m17, 1918.

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THOMAS G. IVIOU'AT, OF IBRATENAHL, OHIO.

RETURN -FITTIN G FOR VAPOR-HEATING SYSTEMS.

To all whom t may concern:

Be it known that I, THOMAS G. -MoUA'ig a citizen of the United States, residing at Bratenahl, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Return-Fittings for Vapor-Heating Systems, of which the followin is a full, clear, and exact de-v scription, re erence being had to the accompanying drawings.

This invention relates to heating systems and has special reference to systems of the low pressure or so called vapor type al though' not necessarily restricted thereto. The objects of the invention are the'provision of a return fitting whereby the condensed water can be returned to the boiler `from the radiator without meeting any live steam, and without danger of drawing the boiler water into the radiators upon the cooling of the same; the p rovision of new and improved arrangements for expelling air Jfrom the radiators; the provision of arrangements whereby a single conveniently located air valve can be used for a large number of radiators; the provision of means for ejecting condensed water in quantities of considerable volume rather thanin a continuous smaller stream whereby erosion of the valves is minimized; while other objects,

and advantagesl will become apparent as the description proceeds.

In the drawings accompanying and forming a part of this application I have illustrated my improved return fitting together with a typical heatingsystem employing the same, although itwill be understood that the particular constructions and designs here illustrated are only a few out of a large number wherein mv invention can be embodied. o

In these drawings Figure 1 illustrates a heating system constructed in accordance with my invention; Fig. 2 represents a' side elevation of my improved return fitting, Fig. 3 is a 4vertical sectional view of said fitting corresponding to the line 3 3V of Fig. 4; Fig. 4 isa vertical, sectional view through said fitting corresponding to the line 4 4 of Fig. 3; Fig. 5 is a transverse sectional view corresponding to the line 5 5 of Fig. 3; and 6 ,is a perspective view of the vapor passage check valve. I

Describing the parts with reference characters, 1 represents the boiler which may be of any suitable type, 2 represents the steam Specification of Letters Patent.

Application led May 17, 1917.

Patented Dec. 17, 1918. serial No. 169,215.

main and 3 the return main. The boiler is preferably provided with a pressure control apparatus of any suitable type, preferably that illustrated and described in my prior patent issued October 19, 1909, Number 937,686.

5, 5 represents radiators, any number of which may be employed within the scope of my invention, said radiators having inlet pines 6 6 connected to the steam main 2 and return pipes 7 7 connected to the return main 3. The inlet pipes are preferably connected tothe upper portions of the radiators as shown, and governed by inlet valves 8, 8'; the return pipes are preferably connected to the lower parts of the radiators as shown, and provided with my improved return fittings 9 9 which will now be described.

Each of these return fittings comprises a hollow cylindrical shell l0 having its upper end closed by a screw cap 11 and having lower end provided with a threaded boss 12 for the attachment of the pipe 7. Formed inside of the shell 10 is a longitudinal par-- tition 13 extending from a point near the top to a point near the bottom of the shell and dividing the same into separate chambers 14 and 15.l The chamber 14 is in constant communication with the boss 12 and outlet pipe 7, while the side of the shell adjacent to its upper end is formed with a lateralscrew-threaded hollow boss 16 whereby the chamber. 15 is maintained in constant communication with the radiator.

Adjacent tol the lower end of the partition 13 is formed an outlet aperture 17 surrounded on the side adjacent to the chamber 14 by a seat whose plane is inclined to the vertical as shown in Fig. 3; and pivoted upon a horizontal spindle 18 which traverses the chamber 14 above said seat is an arm 19 carrying a v alve 2O which cooperates with said seat. The direction of the inclination is such that the valve 20 will be held to its seat by the action of gravity and the force of such holding is proportionate to the slope of such inclination which I have found may conveniently be made approXimatelySO ydegrees, although I do not restrict myself to any particular figure. I have illustrated they outer wall of the chamber 14 as formed with a threaded opening closed by ascrew plug 21, said opening permitting the insertionl of a tool for reaming the valve seat and asselri bling the valve.

its

the reception of the air valve.y rIliis devicepreferably consists of a plate 25 having a threaded boss 26 adapted to screw into the said aperture land formed with a small.l

longitudinal bore 27. Freely hinged outside of the face of this plate is a movable valve member 29, so arranged that its closing portioni will normally hangspaced a short distance from the `face of the plate 25, but adapted upon the slightest fiu'id movement toward the radiator to swing towardsaid plate andclose-tlie opening. A tongue 30 is preferablyT employed to limit the opening movement of the valve 29. The return main 3 is provided-with a single air escape valve 35, preferably of the automatic type, the same being located in the basement of the building or at any other suitable' point.

Upon vthe operation. of a system con structedasabove described, the admission of steam r`into any radiator will displace the airtlirough the bore 27 and clianibeivle into the .ieturnniain 3 andk permit its escape through the valve 35. No air displaced from any radiator can find its way into any other radiator owing to the fact that the air valves 29 prevent such movement, All water.

condensed in the radiator flows into the cor- 'responding chamber 15 until the pressure dueto its height displacesthe valve 20. whereupon the chamber quickly empties it` self` andftlievalve closes.- The location of' thesteam escape valve separate from and above `the .water valve tends to prevent the former :from becoming clogged or chokedand permits' vit 'to befinade more'delicate than would otherwise be feasible.

It Twill' be yobvious thatmany details in# design,construction, and arrangement can be made without changing"theoperation of the device or sacrificing. its-advantagesy or departing from my inventive ideal and all of suoli ,modification I claim as lwithin the purview of my Letters Patent.

Having thus described my invention, what Iclaim is:

1.'In"a heating system, asteani radiator, a chambered casing communicating with the lowest part of said radiator and adapted to leading fromsaid casingto the return mc in, a cliecl` valve iii.said.casing,and.a normally openl air discharge connectionalso communirushot lHuid.

2.".1In'a heating system in.-,combinationa steam radiator, an outlet 'fittinghaving `its upper 'part connected to-the lowest point .of saidradiato'r and comprising anuprighthollow "casing having a longitudinal.partition.yl

thereacross, the lower part" of said fitting being connected to the return main, said partition defining two chambers, one of which communicates with the radiator and the otherwitli said main, `the lower part of said partition being formed with an aperture, a valve seat surrounding said aperture upon the side adjacent to the second chamber aperture, a check valve in said second chamber coperating. with said seat and normally held in contact with same by gravity, means normally est( blishing communication between said radiator and said second chant.

ber at a point above said aperture, and a normally open checlrvalve governing said .l

last means adapted to be closed by a rush of fiuid toward said radiator.

3. Ina heating system, a return fitting for steam radiators comprising a hollow casing having inlet and outlet connections, a partition between said ,connections and hav-z. ing .1a pair of apertures therein, one at a higher level than the other and a check valve for each aperture, both of said valves being disposed uponthe side of saidpartition adjacent to the outlet connection, the lower..

check valve being closed by gravity and the,

upper valvebeiiig opened by gravity.

4:. In a heating system, a return fitting for steam radiators comprisingl a hollowv casing having inlet andoutlet connectionsv a partition between said connections and...

having a pair of apertures therein, one at a higher level than the other, and a check valve for each opening,` both ofsaid valves being disposedupon the-sideof said partition adjacent to the outlet connection, the` lower valve being normally. closed and the...

upper check valve being .normally open.. 5.,.In a heatingsystem,l a return fitting for steam radiators comprising` ahollowg.

casing having `inlet and outlet,connections,`

a longitudinal lpartition in said 'casing di. vidiiig Ythesame into two chambers,.one ofy which communicates withthe outlet-and the other with the inlet, said partition yhaving a pair offapertures therein, one oi:'-c0mparaV tively large size and adjacent to the outlet, and the other of comparatively small size and adjacent to the inlet, a check valve in the e n outlet `chamber and normally closing-the receive condensed water therefrom,y a pipe larger aperture and adapted tobeopened only by the collection of a considerable` amount of liquid inY saidJ inlet chamber,v and.. 1

a normally open check .valve insa-id outlet chamberand cooperating with saidsmallerU-.fl

aperture :and adaptedto be closed only upon.

the .commencement cfa `vapor movementfj having. inlet and outlet, connections at opposite ends, a longitudinal partition.-.in, said casing ldividing ythe same into Atwo elon-z f y gatedchambers, one 4of which communicates with the outlet and the other with the inlet, said partition having a pair of apertures therein, one of comparatively large size and adjacentto the outlet, and the other of comparatively small size and adjacent to the inlet, a valve seat surrounding said first aperture and having its plane inclined relatively to the aXis of the casing, a check valve in the outlet chamber and normally resting on said seat, and a second check valve in said outlet chamber and hanging loosely in front of said smaller aperture and normally at a small distance therefrom.

7. In a heating system, a return fitting for steam radiators comprising an elongated hollow casing havingat one end an outlet opening and adjacent to the other end an inlet opening, a longitudinal partition Within said casing and defining two chambers, one of which communicates with each opening, said partition having a pair of apertures therein, one near said outlet opening, and the other near said inlet opening, a pair of check valves in said outlet chamber, one for each opening, the check valve nearest to the outlet being adapted and arranged normally to close its opening and to be displaced therefrom only by a collection of a material amount of liquid in the inlet chamber, and the other of said check valves being adapted and arranged normally to leave its passageway open and to move to closed position only upon the occurence of gas movement toward the inlet chamber.

8. In a heating system, the combination with a steam radiator, of a hollow elongated upright casing, the upper end of said casing being attached to the lower part of said radiator and the lower part of said casing being connected t0 the return main, an upright partition inside said casing and forming a pair of chambers therein one of which communicates with said radiator and the other with said return pipe, said partition having a pair of openings therein, one near the bottom and one near the top, and a pair of check valves in said last chamber, one for each of said openings, the lower check valve being normally closed and the upper check valve being normally open.

9. In a heating system, the combination with a steam radiator, of a hollow elongated upright casing, the upper end of said casing being attached to the lower part of said radiator, and the lower part of said casing being connected to the return main, an upright partition inside said casing and forming a pair of chambers therein, one of which communicates with said radiator and the other with said return pipe, said partition having a pair of openings therein, one near the bottom and one near the top, and a pair of check valves in1 said last chamber, one for each of said openings, the lower part of said partition being inclined whereby its check valve is normally closed, and the upper check valve being 'spaced slightly from its aperture so as to normally remain open.

In testimony whereof, I hereunto ai'iX my signature.

THOMAS G. MOUAT.

Copies of thinl patent may be obtained for live cents each, by addressing the Commissioner of Patents, Washington, D. C. 

